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I found two one near tank and one near oil filter housing I opened the tank and the float was down opened one valve and it came back up few bubbles out of the one near the tank none near oil filter

Turned the car off and on and the float is right down... Confused

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Bubbles you say ? Well you have air in your system the car will over heat.
Open the screw turn your switch on put hot air on blast, fill your tank to the top until there are no bubbles coming out of the bleeding screw next to the tank.

Then it's full. Gotta keep in mind when you crank the car the coolant goes into the engine. But if you saw bubbles, then fill until you see no bubbles come out and the stick floats up once it does its full. Check the bottom to see if it's not spilling it no where.

4) Begin to fill your expansion tank with ideally a 50/50 mix of Genuine BMW coolant and distilled water (do not use anything else--no reason to. The proper stuff is cheap) The system might take a while to swallow the water. Massage the hoses if you think it will help. Keep pouring. Water will begin to pour out of the bleed screw hole with air bubbles. The point is to keep filling and filling until the bubbles are gone. This may take a while--be patient.

5) Once you are satisfied that a continual stream of bubble-free water is emerging from the bleed hole and that your cooling system is adequately filled, go ahead and replace the bleed screw (do not overtighten). The expansion tank will be full to the top at this point so you'll need to siphon off any excess so that the appropriate tank level can be achieved.

I think there were originally two drain plugs at the bottom of the radiator on the same side where you fill the overflow tank. If the entire cooling system has been replaced (which it should have been by now), there may be only one drain plug. There should also be a drain plug in the block on the exhaust side as I recall, but if you just need to drain out a gallon to make room for pure coolant, the drain at the bottom of the radiator will drain out a gallon. If you have pets, remember that coolant smells sweet but is poisonous.

So basically I take of the bleed cap and fill until no bubbles are coming then start the car with heat up for few min then undo the bleed cap until no bubbles then it's done

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No no no !! Don't take it off.
Step one: turn the switch on your car.
Step two: put your heat on blast.
Step three: go to your bleed screw slightly unscrew it until coolant starts coming out.
Step four: let all the bubbles come out. Until you see just coolant with no bubbles.
Step five: fill until the stick goes all the way up.
Step six: close everything and you are done.

No no no !! Don't take it off.
Step one: turn the switch on your car.
Step two: put your heat on blast.
Step three: go to your bleed screw slightly unscrew it until coolant starts coming out.
Step four: let all the bubbles come out. Until you see just coolant with no bubbles.
Step five: fill until the stick goes all the way up.
Step six: close everything and you are done.

You remove the screw entirely. Look at the thread that was linked to by SolidJake, and countless other bleeding DIYs. Maybe this idea of loosening the bleeder screw vs removing it entirely is how so many people seem to end up incorrectly bleeding the system.

You remove the screw entirely. Look at the thread that was linked to by SolidJake, and countless other bleeding DIYs. Maybe this idea of loosening the bleeder screw vs removing it entirely is how so many people seem to end up incorrectly bleeding the system.